@leocg My mistake, misinterpreted your reply.

What a disaster, can't see why anyone would want this feature.

@leocg worryingly I downloaded Opera developer build just now to test, and I'm still having the same problem (gap at the top.).

I've tried checking and unchecking the box for this settings option, but the top spacing isn't going away. This problem started just yesterday, previously it worked as intended for me.

I've tried uninstalling and reinstalling opera but this didn't fix the issue. Any help?

This is getting really frustrating.